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NAME

       vlogger - flexible log rotation and usage tracking in perl

SYNOPSIS

       vlogger [OPTIONS]... [LOGDIR]

DESCRIPTION

       Vlogger is designed to make webserver log rotation simple and easy to
       manage.  It deals with VirtualHost logs automatically, so only one
       directive is required to manage all hosts on a webserver.  Vlogger
       takes piped output from Apache or another webserver, splits off the
       first field, and writes the logs to logfiles in subdirectories.  It
       uses a filehandle cache to avoid resource limitations.  It will start a
       new logfile at the beginning of a new day, and optionally start new
       files when a certain filesize is reached.  It can maintain a symlink to
       the most recent log for easy access.  Optionally, host parsing can be
       disabled for use in ErrorLog directives.

       To use vlogger, you need to add a "%v" to the first part of your
       LogFormat:

       LogFormat "%v %h %l %u %t \"%r\" %>s %b \"%{Referer}i\"
       \"%{User-Agent}i\"" combined

       Then call it from a customlog:

       CustomLog "⎪ /usr/sbin/vlogger -s access.log -u www-logs -g www-logs
       /var/log/apache" combined

OPTIONS

       Options are given in short format on the command line.

       -a      Do not autoflush files.  This may improve performance but may
       break logfile analyzers that depend on full entries in the logs.

       -e      ErrorLog mode.  In this mode, the host parsing is disabled, and
       the file is written out using the template under the specified LOGDIR.

       -n      Disables rotation.  This option disables rotation altogether.

       -f MAXFILES      Maximum number of filehandles to keep open.  Defaults
       to 100.  Setting this value too high may result in the system running
       out of file descriptors.  Setting it too low may affect performance.

       -u UID      Change user to UID when running as root.

       -g GID      Change group to GID when running as root.

       -t TEMPLATE      Filename template using Date::Format codes.  Default
       is "%m%d%Y-access.log", or "%m%d%Y-error.log".  When using the -r
       option, the default becomes "%m%d%Y-%T-access.log" or
       "%m%d%Y-%T-error.log".

       -s SYMLINK      Specifies the name of a symlink to the current file.

       -r SIZE      Rotate files when they reach SIZE.  SIZE is given in
       bytes.

       -d CONFIG      Use the DBI usage tracker.

       -h      Displays help.

       -v      Prints version information.

DBI USAGE TRACKER

               Vlogger can automatically keep track of per-virtualhost usage statistics in a
       database.  DBI and the relevant drivers (eg. DBD::mysql) needs to be installed for
       this to work.  Create a table in your database to hold the data.  A "mysql_create.sql"
       script is provided for using this feature with MySQL.  Configure the dsn, user, pass
       and dump values in the vlogger-dbi.conf file.  The "dump" parameter controls how often
       vlogger will dump its stats into the database (the default is 30 seconds).  Copy this
       file to somewhere convienient on your filesystem (like /etc/apache/vlogger-dbi.conf) and
       start vlogger with "-d /etc/apache/vlogger-dbi.conf".  You might want to use this feature
       to easily bill customers on a daily/weekly/monthly basis for bandwidth usage.

SEE ALSO cronolog(1), httplog(1)


BUGS None, yet.


AUTHORS Steve J. Kondik <shade@chemlab.org>

       WWW: http://n0rp.chemlab.org/vlogger



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